<!DOCTYPE HTML>

<html lang="zh-cmn-Hans">
<head>
<meta charset="utf-8" />
<title>HTML5模仿骇客帝国文字矩阵效果</title>
<style type="text/css">
	body{margin: 0;}
	#q{width: 100%;height: 100%;}
</style>
</head>
<body>

<canvas id="q"></canvas>
<script type="text/javascript" >
var s = window.screen;
var width = q.width = s.width;
var height = q.height = s.height;
var letters = Array(256).join(1).split('');
var draw = function () {
  q.getContext('2d').fillStyle='rgba(0,0,0,.05)';
  q.getContext('2d').fillRect(0,0,width,height);
  q.getContext('2d').fillStyle='#0F0';
  letters.map(function(y_pos, index){
    text = String.fromCharCode(3e4+Math.random()*33);
    x_pos = index * 10;
    q.getContext('2d').fillText(text, x_pos, y_pos);
    letters[index] = (y_pos > 758 + Math.random() * 1e4) ? 0 : y_pos + 10;
  });
};
setInterval(draw, 33);
</script>

</body>
</html>